Welcome to the Winobloggers webpage! Students and professors from different universities meet to discuss their findings on Winogradsky columns they constructed!
We learn how to formulate hypotheses, observe, comment, ask and reply to questions related to our scientific experiments.

It seems we have some chlorophytes (from what I can see from the photo) growing growing at the sediment/water interface. This means that the water (and the top few mm of the sediment) is oxic; did the water turn out anoxic? Did it ever smell H2S?